Once a week? Those things could go pretty much forever on a single charge so long as you weren’t making calls, even with batteries that had a tiny fraction of modern capacity due to their simple hardware.

Nowadays even a completely idle smartphone on extreme power saving mode is lucky to last a couple of days, especially if you don’t/can’t disable the vendor-mandated bloatware that periodically wakes it up to phone home. When used regularly, it’s not uncommon for a phone to drain within a single day.

Sometimes I miss the simple, rugged designs - right up until I remember how much better smartphones are at literally everything else. Still wish companies would get the memo and focus on bigger batteries rather than smaller phones, though.